package org.smart4j.framework.proxy;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Method;

/**
 * 切面代理
 * @author fance
 * @date 18-4-19 上午10:41
 */
public abstract class AspectProxy  implements Proxy {

    private static final Logger logger = LoggerFactory.getLogger(AspectProxy.class);

    @Override
    public Object doProxy(ProxyChain proxyChain) throws Throwable {
        Object result = null;

        Class<?> cls = proxyChain.getTargetClass();
        Method method = proxyChain.getTargetMethod();
        Object[] params = proxyChain.getMethodParams();
        begin();

        try {
            if (intercept(cls, method, params)) {
                before(cls, method, params);

                result = proxyChain.doProxyChain();
                after(cls, method, params, result);

            } else {
                result = proxyChain.doProxyChain();
            }
        } catch (Exception e) {
            logger.error("proxy failure", e);
            error(cls, method, params, e);
            throw e;
    } finally {
            end();
        }
    return result;
}

    public void  begin() {

    }

    public void  end() {

    }

    public boolean intercept(Class<?> cls, Method method, Object[] params) throws Throwable{
        return true;
    }
    public void before(Class<?> cls, Method method, Object[] params) throws Throwable{
    }

    public void after(Class<?> cls, Method method, Object[] params, Object result) throws Throwable{
    }

    public void error(Class<?> cls, Method method, Object[] params,  Throwable e) {
    }


}
